大约有 6,887 项符合查询结果（耗时：0.0317秒） [XML]
What is Normalisation (or Normalization)?
...that it is tricky to update, tricky to query against, and you cannot apply indexes, constraints and so on.
(2) Having redundant non-key data (ie. data repeated unnecessarily in several rows). Example:
UserId | UserName | Car
-----------------------
1 | John | Toyota
2 | Sue | F...
Are soft deletes a good idea? [duplicate]
...
Also worth mentioning: a UNIQUE index in combination with soft deletes can make for a mess. E.g. trying to register a deleted username will fail, even though it is not in use.
– Danny Beckett
Jul 13 '13 at 21:38
...
Reference requirements.txt for the install_requires kwarg in setuptools setup.py file
...ages included in the repo under deps/:
# fetch specific dependencies
--no-index
--find-links deps/
# install package
# NOTE: -e . for editable mode
.
pip executes package's setup.py and installs the specific versions of dependencies declared in install_requires. There's no duplicity and the purp...
API Keys vs HTTP Authentication vs OAuth in a RESTful API
...the API, then use oAuth.
Here's a good description: http://www.srimax.com/index.php/do-you-need-api-keys-api-identity-vs-authorization/
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What does principal end of an association means in 1:1 relationship in Entity framework
...is. I've come to find out that EF to this day has never implemented unique indexes. As a result, the only way available to map a one-to-one is to use the primary key of the principal end as the primary key of the dependent end, because a primary key is by nature unique. In other words, they half-imp...
iOS 8 removed “minimal-ui” viewport property, are there other “soft fullscreen” solutions?
...position: absolute;
top: 0;
left: 0;
z-index: 100;
width: 100%;
height: 100%;
overflow: hidden;
background-color: rgba(0, 0, 0, 0.5);
color: #fff;
display: none;
}
@media scre...
Why does my JavaScript code receive a “No 'Access-Control-Allow-Origin' header is present on the req
..."*" for Apache - this will unblock CORS from any domain.
location ~ ^/index\.php(/|$) {
...
add_header 'Access-Control-Allow-Origin' "$http_origin" always;
add_header 'Access-Control-Allow-Credentials' 'true' always;
if ($request_method = OPTIONS) {
add_header 'Acces...
How to echo with different colors in the Windows command line
...15" );
Environment.Exit( 1 );
} else if (e.message == "Index was outside the bounds of the array.") {
print( "invalid arguments" );
Environment.Exit( 2 );
} else {
print ( "Error Message: " + e.message );
print ( "Error Code...
Easy interview question got harder: given numbers 1..100, find the missing number(s) given exactly k
...tions of the while loop body) is at most N-1.
The third loop prints those indexes of the array i that are not occupied by the value i - this means that i must have been missing.
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Equivalent C++ to Python generator pattern
...on is available in Boost boost.org/doc/libs/1_57_0/libs/coroutine/doc/html/index.html with a proposal for standardization here: open-std.org/jtc1/sc22/wg21/docs/papers/2014/n3985.pdf
– boycy
Jan 13 '15 at 17:00
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